Full movie description "Hawaii Five-O Why Won't Linda Die?":

A member of the Canadian Parliament is killed in a hit-and-run accident in a remote area, and Five-O discovers that he was apparently on Oahu to meet the one person whom he knew there, a stewardess named Linda Forbes. McGarrett's initial attempt to question Linda is rebuffed by her uptight sister, Diana, though he eventually meets with Linda and finds that she is virtually the exact opposite of her sister. But as the evidence mounts that Linda had something to do with the hit-and-run death, McGarrett is forced to examine what he increasingly finds is the odd relationship between the two sisters.

Reviews of the Hawaii Five-O Why Won't Linda Die?

For the first ten years "Hawaii Five-O" was on the air, it maintained a
very consistent high quality product. However, season 11 took a HUGE
downward turn---producing many downright embarrassing episodes. While
"Why Won't Linda Die?" might not be the very worst of the season, it
sure is close and is just awful. While there were a few good season 11
episodes, they were unfortunately few and far between.

The show begins with someone deliberately running a guy off a cliff
with their car. While a spectacular scene, I kept wondering how hard it
might have been to just step out of the way. Oh, well. The man ended up
being a member of the Canadian Parliament, so McGarrett and his men
take the case instead of leaving it to the regular police.

There aren't a lot of leads. One of the few they find is an envelope
with a local name and address. So they go looking for Linda Forbes but
at first only find her sister, Diana--who is rather nasty and hard to
understand. Later, we see Linda and she is the opposite of her sister.
While Diana is emotionally constricted and about as much fun as Ebola,
Linda is vivacious and cute. This brings me to a HUGE (freaking HUGE)
problem with the show. Anyone with 20/100 vision or better would see
right away that Linda and Diana are the same person--just dressed
differently and with one wearing a wig. Folks who know BOTH sisters
never noticed this or that you NEVER see the two together!! McGarrett,
with his trained cop senses, also doesn't see this. Now I did mark
above that this is a spoiler, but the audience would almost certainly
also see that they are one in the same. To base an entire show on such
a shoddy and poorly executed idea is pretty limp (the acting was VERY
broad). What exactly becomes of all this, you can find out for
yourself...if you care. My advice is just watch seasons 1-10 instead!

By the way, what's with the grave at the end of the show? The funeral
marker is clearly VERY old and the painting on it really looked lame.
Plus, it could NOT have been the person they said it was--the age just
doesn't add up at all.